Vader was absolutely toying with Luke in Empire. Look how he is fighting with one hand, effortlessly parries, and disarms him with no effort. Luke is naive and hopelessly outmatched. Vader is trying to capture and turn him, not defeat him.
The most disappointing thing about Dis Wars is the terrible squandering of all the actors portraying classic characters: from the sequel trilogy to cringe worthy lost opportunities in Boba Fett and Obi Wan. Completely wasted opportunities. The sequel trilogy was done in by a rush to make back their investment, idiotically did not wait until a coherent, sensical, and compelling story arch could be developed, and creating a slew of unmemorable characters that had no on-screen comradery or chemistry and weren't developed enough to care about. While many of what has been churned out has had flashes of potential, Rogue One and Andor are the only completely decent things they've made.